Worst air pollution Cedar Park - Philadelphia, today and tomorrow
Today (20 September): Air quality in Cedar Park is fair. AQI, NO2, O3, and PM1 are fair; PM2.5, PM10, SO2, CO, and HCHO are good. Pollution peaks around 6:00 PM (NO2: 38.4/100).
Tomorrow (21 September 2026): Air quality in Cedar Park is moderate. AQI worsens to moderate; NO2 increases to moderate; PM1 decreases to good; all other pollutants stay as today. Pollution peaks around 2:00 PM (NO2: 40.5/100). Airmine updates local air quality forecasts four times daily.
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In Cedar Park, road traffic and general city density are the leading contributors to particulate matter and nitrogen dioxide here. Tree cover nearby helps soften the local particulate load to a degree. Day-to-day readings still shift with wind direction, traffic volume, and weather conditions. Local monitoring for the wider area tends to track closely with this general pattern.
Today - 20 September | Pollution peaks at 18:00
AQI:
Fair
38.4/100
PM2.5 (fine particles):
Good
17.8/100
PM10 (coarse particles):
Good
14.6/100
NO2 (nitrogen dioxide):
Fair
38.4/100
O3 (ozone):
Fair
28.1/100
SO2 (sulfur dioxide):
Good
2.0/100
CO (carbon monoxide):
Good
0.6/100
HCHO (formaldehyde):
Good
3.1/100
PM1 (ultrafine particles):
Fair
21.6/100
Levels show the poorest local air quality during the day
Tomorrow - 21 September | Pollution peaks at 14:00
AQI:
Moderate
40.5/100
PM2.5 (fine particles):
Good
17.5/100
PM10 (coarse particles):
Good
13.3/100
NO2 (nitrogen dioxide):
Moderate
40.5/100
O3 (ozone):
Fair
31.7/100
SO2 (sulfur dioxide):
Good
2.3/100
CO (carbon monoxide):
Good
0.6/100
HCHO (formaldehyde):
Good
4.0/100
PM1 (ultrafine particles):
Good
18.5/100
Other Landmarks in Philadelphia
Sports venues in Philadelphia
Frequently Asked Questions
Is air quality bad in Cedar Park right now?
On 20 September 2026, overall air quality in Cedar Park is fair. AQI is the main air quality indicator at 38.4/100. Pollution peaks around 6:00 PM (NO2: 38.4/100).
Will air quality be worse tomorrow in Cedar Park?
On 21 September 2026, air quality conditions in Cedar Park will be worse than today, with AQI forecast at moderate at 40.5/100. Pollution peaks around 2:00 PM (NO2: 40.5/100).
When is air pollution at its worst in Cedar Park?
Winter months routinely see the year's steepest rise in particulate matter across this urban area, when winter inversions hold traffic and heating emissions in place over the city for days at a time. As temperatures climb, ozone typically becomes the dominant summer issue in this part of the city, as intense summer sunlight bakes traffic emissions into ground-level ozone across the urban core.
Are air quality levels in Cedar Park based on measurements or forecasts?
It is forecasts derived by downscaling forecasts provided by EU’s Copernicus Atmosphere Monitoring Service (CAMS) by taking into account local conditions such as traffic patterns. CAMS bases its forecast on satellite measurements of particles and chemical compounds in the atmosphere. Airmine’s services were developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team.
Why doesn’t the forecast always reflect wildfire impacts?
Airmine’s forecast uses CAMS (Copernicus Atmosphere Monitoring Service) as its background atmospheric model. While CAMS includes wildfire emissions, these are derived from satellite observations and are not available in real time. During rapidly evolving wildfire events, there may therefore be a delay before increased emissions are incorporated into the model. As a result, the forecast may temporarily underestimate PM₂.₅ and other pollutants associated with wildfire smoke.
During rapidly evolving wildfire events, CAMS may lag by approximately 1–2 days before increased wildfire emissions are fully represented, which can lead to temporary underestimation of PM₂.₅ concentrations in Airmine’s forecast.
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Data provided by Airmine — Last update: 20 September 2026 at 20:27 CEST (Data is updated four times daily.)
This forecast is produced independently using Airmine's own atmospheric data and models.
Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.
Disclaimer: Forecasts are provided for informational purposes only and should not be relied upon as medical advice. Actual pollen and air quality conditions may vary from the forecast. If you have allergies, asthma, or another medical condition, consult a healthcare professional. Please see our Terms of Service for important information about limitations of liability.
Some text on this page may be generated or summarised using artificial intelligence (AI). Wherever possible, AI-generated content is enriched with Airmine's proprietary data to improve its accuracy and relevance. However, AI-generated content may still contain errors, omissions, or inaccuracies.
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